Fleming’s left-hand rule
E447289
Fleming’s left-hand rule is a mnemonic used in electromagnetism to predict the direction of force on a current-carrying conductor in a magnetic field.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fleming’s left-hand rule canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4501944 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Fleming’s left-hand rule Context triple: [John Ambrose Fleming, knownFor, Fleming’s left-hand rule]
-
A.
Lenz's law
Lenz's law is a fundamental principle of electromagnetism stating that an induced current or electromotive force always acts in a direction that opposes the change in magnetic flux that produced it.
-
B.
Faraday's law of induction
Faraday's law of induction is a fundamental principle of electromagnetism that relates changing magnetic flux through a circuit to the induced electromotive force (voltage) in that circuit.
-
C.
Ampère's force law
Ampère's force law is a fundamental principle in electromagnetism that quantifies the mechanical force between electric currents in conductors.
-
D.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
-
E.
Ampère–Maxwell law
The Ampère–Maxwell law is one of Maxwell’s equations that relates magnetic fields to electric currents and changing electric fields, thereby introducing the concept of displacement current and enabling the prediction of electromagnetic waves.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Fleming’s left-hand rule Target entity description: Fleming’s left-hand rule is a mnemonic used in electromagnetism to predict the direction of force on a current-carrying conductor in a magnetic field.
-
A.
Lenz's law
Lenz's law is a fundamental principle of electromagnetism stating that an induced current or electromotive force always acts in a direction that opposes the change in magnetic flux that produced it.
-
B.
Faraday's law of induction
Faraday's law of induction is a fundamental principle of electromagnetism that relates changing magnetic flux through a circuit to the induced electromotive force (voltage) in that circuit.
-
C.
Ampère's force law
Ampère's force law is a fundamental principle in electromagnetism that quantifies the mechanical force between electric currents in conductors.
-
D.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
-
E.
Ampère–Maxwell law
The Ampère–Maxwell law is one of Maxwell’s equations that relates magnetic fields to electric currents and changing electric fields, thereby introducing the concept of displacement current and enabling the prediction of electromagnetic waves.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
mnemonic
ⓘ
rule in electromagnetism ⓘ |
| appliesIn |
electric motors
ⓘ
galvanometers ⓘ moving-coil loudspeakers ⓘ rail guns and linear motors ⓘ |
| appliesTo | current-carrying conductor in a magnetic field ⓘ |
| associatedWith |
Lorentz force
ⓘ
motor effect ⓘ |
| assumes |
straight conductor segment for simple application
ⓘ
uniform magnetic field in region of conductor ⓘ |
| basedOn | vector cross product between current and magnetic field ⓘ |
| category |
electromagnetic rule
ⓘ
physics mnemonic ⓘ |
| clarifies | relationship between magnetic field, current, and force directions ⓘ |
| contrastedWith | Fleming’s right-hand rule ⓘ |
| conventionalCurrent | positive to negative ⓘ |
| directionConvention |
first finger at right angles to second finger
ⓘ
second finger at right angles to thumb ⓘ thumb perpendicular to first and second fingers ⓘ |
| educationalUse |
helps visualize vector directions in 3D
ⓘ
taught in school physics ⓘ |
| field | electromagnetism ⓘ |
| fingerRepresentation |
first finger represents direction of magnetic field
ⓘ
second finger represents direction of conventional current ⓘ thumb represents direction of force or motion ⓘ |
| handUsed | left hand ⓘ |
| hasAlternativeName | Fleming’s left-hand motor rule ⓘ |
| helpsAvoid | sign errors in direction of force ⓘ |
| historicalPeriod | early 20th century ⓘ |
| namedAfter | John Ambrose Fleming ⓘ |
| notation | FBI mnemonic (Force, B-field, I current) in some texts ⓘ |
| relatedConcept |
Lorentz force law
ⓘ
linked to:
Lorentz force
right-hand rule for cross products ⓘ |
| relatesQuantity |
electric current
ⓘ
magnetic field ⓘ mechanical force ⓘ |
| rightHandRuleUsage |
Fleming’s right-hand rule is used for generators
ⓘ
linked to:
Fleming’s right-hand rule
|
| usedBy |
students of physics and electrical engineering
ⓘ
teachers of electromagnetism ⓘ |
| usedFor |
determining direction of motion in electric motors
ⓘ
predicting direction of force on a current-carrying conductor ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Fleming’s left-hand rule Description of subject: Fleming’s left-hand rule is a mnemonic used in electromagnetism to predict the direction of force on a current-carrying conductor in a magnetic field.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.